JPH0581727B2 - - Google Patents

Info

Publication number
JPH0581727B2
JPH0581727B2 JP18439190A JP18439190A JPH0581727B2 JP H0581727 B2 JPH0581727 B2 JP H0581727B2 JP 18439190 A JP18439190 A JP 18439190A JP 18439190 A JP18439190 A JP 18439190A JP H0581727 B2 JPH0581727 B2 JP H0581727B2
Authority
JP
Japan
Prior art keywords
filter
partition wall
partition
region
soot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP18439190A
Other languages
Japanese (ja)
Other versions
JPH0357810A (en
Inventor
Shusutaa Hansuudeiitaa
Nunneman Furiidoherumu
Rangaa Hansuuyoahimu
Shutoroomaa Eruin
Teiifuenbatsuhyaa Geruto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of JPH0357810A publication Critical patent/JPH0357810A/en
Publication of JPH0581727B2 publication Critical patent/JPH0581727B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • B01J35/56—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/165—Thermal imaging composition

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、内燃機関の排気ガスの流動方向に延
び反対側の端部がストツパによつて閉塞され多孔
性の隔壁によつて互いに分離された多数の通路を
有する多孔性磁器の一体的なフイルタブロツクか
らなり、隔壁が、触媒層を備えフイルタの下流側
端部の領域において大きくされた流動抵抗を有す
る煤焼却フイルタに関する。Detailed Description of the Invention [Industrial Application Field] The present invention is directed to an internal combustion engine, which extends in the flow direction of exhaust gas from an internal combustion engine, has opposite ends closed by stoppers, and is separated from each other by a porous partition wall. The invention relates to a soot-burning filter consisting of an integral filter block of porous porcelain with a large number of channels, the partition wall of which is provided with a catalyst layer and has an increased flow resistance in the region of the downstream end of the filter.

［従来の技術］ 一般に、煤焼却フイルタは、互いに平行な薄肉
の通路から作られた多孔性磁器の一体構造物から
なり、その通路は内燃機関の排気ガスの流動方向
に見て、その全長に延びている。この通路は、そ
れぞれ、その上流側の端部または下流側の端部に
おいて閉塞されている。この場合、この通路は、
しばしば基盤縞の形式で閉塞されるか開放されて
いるため、それぞれの通路は、開放端部と閉塞端
部とを有している。このようなフイルタは、例え
ばヨーロツパ特許第0277012号公報から知られて
いる。このようなフイルタを通つて排気ガスが流
れる場合、この排気ガスは、入口側の開放された
通路に流入した後、通路の間の多孔性の隔壁を通
して出口側の開放された通路に強制的に流され
る。その場合、隔壁を通過することが不可能な煤
粒子が、上流側の開放された通路の隔壁に集めら
れる。隔壁の触媒層を使用して低下されることが
可能な所定の引火温度に達し、酸素濃度が充分で
ある場合、集められた煤が燃焼し、フイルタが修
復される。煤粒子な主に下流のストツパの手前の
領域に集められ、したがつて、この領域が自由燃
焼時に高熱に曝されるため、ヨーロツパ特許第
0277012号において、この領域の通路間の隔壁が、
多孔性のセラミツク材料からなる付加層によつ
て、その他の領域よりガスが通りにくいようにさ
れている。このようにして、この領域では流動抵
抗が高くなり、したがつて排気ガスの流れが減少
するため、集められる粒子が少なくなり、燃焼時
における熱負荷を減少させることができる。[Prior Art] Generally, a soot incineration filter consists of an integral structure of porous porcelain made of mutually parallel thin-walled passages, and the passages have a diameter along their entire length when viewed in the flow direction of the exhaust gas of an internal combustion engine. It is extending. The passages are each closed at their upstream or downstream ends. In this case, this passage is
Often closed or open in the form of base stripes, each passageway has an open end and a closed end. Such a filter is known, for example, from European Patent No. 0277012. When exhaust gas flows through such a filter, this exhaust gas flows into the open passage on the inlet side and is then forced through the porous partition between the passages into the open passage on the outlet side. be swept away. In that case, soot particles that are unable to pass through the partition wall are collected on the partition wall of the upstream open passage. When a predetermined flash temperature is reached, which can be lowered using a catalyst layer in the septum, and the oxygen concentration is sufficient, the collected soot is combusted and the filter is repaired. European patent no.
In No. 0277012, the partition between the passages in this area is
An additional layer of porous ceramic material makes it more difficult for gas to pass through than other areas. In this way, the flow resistance is high in this region and the flow of exhaust gas is therefore reduced, so that fewer particles are collected and the heat load during combustion can be reduced.

この装置の場合、ストツパの手前の領域に排気
ガスが流れるために、排気ガス中の一緒に運ばれ
て、まだ燃焼しない粒子によつて、隔壁およびス
トツパが機械的な摩耗を受け、この摩耗が特に隔
壁とストツパとの間の結合個所に生じる欠点があ
る。 In this device, because the exhaust gas flows into the area in front of the stopper, the bulkhead and the stopper are subjected to mechanical wear due to particles in the exhaust gas that are carried along with them and are not yet combusted. Disadvantages arise in particular at the connection points between the partition and the stop.

さらに、前記領域において、フイルタ壁に膨張
係数の高い材料を埋め込むことによつて、温度の
変化時に、隔壁とストツパとの間に機械的な応力
が生じ、このためフイルタが破損する場合があ
る。さらに、フイルタ隔部への埋込みは、セラミ
ツク材料との化学反応およびその結果としての材
質変化を起こす原困になる。 Furthermore, by embedding a material with a high coefficient of expansion in the filter wall in said region, mechanical stresses can occur between the partition wall and the stopper during temperature changes, which can lead to the filter breaking. Furthermore, embedding it in the filter partition poses the problem of chemical reactions with the ceramic material and resulting material changes.

そのほかの欠点は、フイルタの燃焼時に、下流
側のストツパの手前の特に温度の影響を受け易い
領域において、この領域の隔壁の触媒層によつて
反応熱が高温度に維持されることである。 Another disadvantage is that during combustion of the filter, the heat of reaction is maintained at a high temperature in a particularly temperature-sensitive region downstream of the stopper by the catalyst layer of the partition wall in this region.

［発明が解決しようとする課題］ したがつて、本発明の目的は、特に下流側のス
トツパの領域において、フイルタの機械的および
熱的な負荷が減少されるように、上位概念に記載
の形式の煤焼却フイルタを改良することである。OBJECT OF THE INVENTION It is therefore an object of the invention to provide a method according to the general concept, in particular in the region of the downstream stopper, so that the mechanical and thermal load on the filter is reduced. The objective is to improve the soot incineration filter.

［課題を解決するための手段］ この目的は、本発明によれば、特許請求の範囲
第１項の特徴部分に記載の構成によつて達成され
る。詳細な構成および利点は、特許請求の範囲の
従属項および下記の説明から明らかである。[Means for Solving the Problem] According to the present invention, this object is achieved by the configuration described in the characterizing part of claim 1. Further details and advantages emerge from the dependent claims and the description below.

排気ガスの流動方向に延びる排気ガス通路を備
え反対側がストツパによつて閉塞された煤焼却フ
イルタの場合、下流側のストツパの手前の領域に
おける通路の間の隔壁が、ガスの通れないように
構成される。これは、例えば、多孔性磁器のフイ
ルタ材料を、細孔を塞ぐ充填剤で含浸することに
よつて行われる。さらに、入口側が開放された通
路に集められた煤粒子の発火温度を下げる隔壁の
触媒層は、ガスを通さない領域の上流側で終結し
ている。この対策によつて、一般的に多量の煤粒
子が集められる下流側ストツパの手前の領域にお
ける煤の燃焼時の反応熱が、排気ガスの流れがな
いことによる酸素量の局部的な不足のために減少
される。したがつて、温度の低下およびこの領域
における縦膨張係数の高い材料の堆積の減少によ
つて、隔壁とストツパとの間に生じる磁器材料の
熱応力が減少される。 In the case of a soot incineration filter that has an exhaust gas passage extending in the flow direction of the exhaust gas and is closed on the opposite side by a stopper, the partition wall between the passages in the region in front of the stopper on the downstream side is configured to prevent gas from passing through. be done. This is done, for example, by impregnating the porous porcelain filter material with a filler that blocks the pores. Furthermore, the catalytic layer of the partition, which lowers the ignition temperature of the soot particles collected in the open-inlet passage, terminates upstream of the gas-impermeable region. With this measure, the heat of reaction during soot combustion in the area before the downstream stopper, where a large amount of soot particles are generally collected, is reduced due to the local lack of oxygen due to the lack of exhaust gas flow. will be reduced to Thermal stresses in the porcelain material between the partition and the stop are therefore reduced by lowering the temperature and by reducing the deposition of material with a high coefficient of longitudinal expansion in this region.

ガスを通さないようにされた隔壁によつて囲繞
された下流側ストツパの手前の領域は、排気ガス
から分離された酸化不可能な粒子の集積領域とし
て使用される。この領域では、排気ガス流内で一
緒に移動される粒子を含む排気ガスが流れないた
め、隔壁およびストツパに機械的な摩耗が生じる
ことがない。特に、隔壁とストツパとの間の従来
危険な結合部が、このような形式によつて、粒子
が磁器材料によつて挟まれ、その結果、くい込ま
れることがないように保護される。 The area in front of the downstream stop, which is surrounded by a gas-tight partition, is used as a collection area for non-oxidizable particles separated from the exhaust gas. In this region, there is no flow of exhaust gas containing particles that are carried along with it in the exhaust gas stream, so that no mechanical wear occurs on the partition wall and the stop. In particular, the hitherto dangerous connection between the septum and the stopper is protected in this manner from particles being pinched by the porcelain material and, as a result, being wedged.

隔壁の触媒層が、ガスの通らないようにされた
領域の上流側で、すでに終結していることによつ
て、フイルタの自由燃焼時における付加的な反応
熱が、この特に危険な領域から遠く離間される。
また、この対策は、隔壁とストツパとの間に堆積
された縦膨張係数の高い粒子が、磁器材料を押し
破りストツパを隔壁から剥すことを防止する。 Because the catalyst layer of the dividing wall is already terminated upstream of the gas-tight area, the additional heat of reaction during free combustion of the filter is carried away far from this particularly dangerous area. separated.
This measure also prevents particles with a high coefficient of longitudinal expansion deposited between the partition wall and the stopper from pushing through the porcelain material and peeling the stopper from the partition wall.

煤焼却フイルタの機械的な強度を一層増加させ
るため、通路の縦方向に延びるフアイバ材料が隔
壁に埋め込まれる。 To further increase the mechanical strength of the soot incineration filter, fiber material extending in the longitudinal direction of the passage is embedded in the partition wall.

［実施例］ 次に、本発明の実施例を図によつて説明する。[Example] Next, embodiments of the present invention will be described with reference to the drawings.

図は、本発明による煤焼却フイルタの下流側端
の断面を示している。フイルタ１を通る排気ガス
の流動方向が、矢２で示されている。流入側が開
放された通路３を通して流入した排気ガスは、そ
の流出側端部がストツパ４によつて閉塞されてい
るため、多孔性の磁器濾過材料からなる隔壁５に
よつて、一緒に運ばれてきた粒子を濾過して、流
出側が開放された通路６に強制的に方向変換され
て流される。フイルタ１の下流端の領域７におい
て、隔壁５が気密に形成され、したがつて、この
領域においては排気ガスの流動がなく、このため
領域７において隔壁５およびストツパ４に流動に
よつて摩耗を生じる原因になる粒子が、排気ガス
流に混つて運ばれることがない。その代り、領域
７は遠心力作用によつて排気ガスから放出された
酸化不能粒子を集めるのに使用される。酸化可能
な粒子は、隔壁の触媒層８によつて低下され得る
発火温度に達した場合、発熱反応で焼却される。
触媒層８が隔壁５のガスを通さない領域７の上流
においてすでに終結しているため、この領域にお
いて反応温度が低下し、熱負荷が一層低くなる。
特に、隔壁５とストツパ４との間の結合部９にお
いて熱応力が減少される。一般に粒子が著しく入
り込んだストツパ４の手前の領域７においては、
排気ガスの流れがないために、酸素濃度がフイル
タ１のその他の領域より明らかに低いことによつ
て、反応温度が一層低くなる。隔壁５とストツパ
４との間の結合部９においては排気ガスの流れが
ないため、この場所に粒子がはさまり喰い込むこ
とがない。反応温度の低下によつて、場合によつ
ては比較的大きな縦膨張係数を有する粒子が、こ
の領域において磁器材料を押し破り、ストツパ４
を隔壁５から剥がすことがない。 The figure shows a cross section of the downstream end of a soot incineration filter according to the invention. The flow direction of the exhaust gas through the filter 1 is indicated by the arrow 2. Exhaust gas that has flowed in through the passage 3 whose inflow side is open is carried along by the partition wall 5 made of porous porcelain filter material because its outflow side end is closed by the stopper 4. The collected particles are filtered and forced to flow into the passage 6, which is open on the outflow side. In the region 7 at the downstream end of the filter 1, the partition wall 5 is formed airtight, so that there is no flow of exhaust gas in this region, so that the partition wall 5 and the stopper 4 are not worn by the flow in the region 7. The particles responsible for the generation are not carried away in the exhaust gas stream. Instead, region 7 is used to collect non-oxidizable particles released from the exhaust gas by centrifugal action. The oxidizable particles are incinerated in an exothermic reaction when the ignition temperature is reached, which can be lowered by the catalyst layer 8 of the septum.
Since the catalyst layer 8 is already terminated upstream of the gas-tight region 7 of the dividing wall 5, the reaction temperature is lower in this region and the heat load is lower.
In particular, thermal stresses are reduced at the connection 9 between the partition 5 and the stop 4. Generally, in the region 7 in front of the stopper 4 where particles have entered considerably,
Due to the lack of exhaust gas flow, the oxygen concentration is significantly lower than in other areas of the filter 1, resulting in a lower reaction temperature. Since there is no flow of exhaust gas at the joint 9 between the partition wall 5 and the stopper 4, particles will not get caught and eaten at this location. Due to the reduction in the reaction temperature, the particles, which may have a relatively large coefficient of longitudinal expansion, break through the porcelain material in this region and cause the stopper 4 to break through.
is not peeled off from the partition wall 5.

隔壁５に磁器フイルタ材料の細孔を閉塞する充
填剤を含浸させることによつて、領域７における
隔壁５をガスが通らないようにすることは、簡単
に行うことができる。隔壁５が含浸処理によつて
絶対的に気密にされない場合、すなわち細孔が完
全に塞がれない場合でも、領域７を通しての排気
ガスの流れを殆ど完全に阻止するのに充分な程度
のガスの非流通性が達成され、したがつて本発明
の利点が得られる。 It is easily possible to make the partition 5 in the region 7 gas-tight by impregnating the partition 5 with a filler that closes the pores of the porcelain filter material. Even if the partition wall 5 is not made absolutely gastight by the impregnation process, i.e. the pores are not completely blocked, a sufficient degree of gas is present to almost completely prevent the flow of exhaust gas through the region 7. non-traffic property is achieved and thus the advantages of the present invention are obtained.

さらに、隔壁５に縦方向に延びるフアイバ材料
が埋め込まれることによつて、煤焼却フイルタ１
の機械的な強度を増加させることができる。 Furthermore, by embedding a fiber material extending in the vertical direction in the partition wall 5, the soot incineration filter 1
can increase the mechanical strength of.

本発明によつて、煤焼却フイルタの機械的およ
び熱的な負荷が、簡単な手段によつて著しく減少
される。 By means of the invention, the mechanical and thermal loads on the soot incineration filter are significantly reduced by simple means.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の一実施例を部分的に示す断面図で
ある。 １…フイルタ、５…隔壁、７…フイルタ下流端
部領域、８…触媒層。 The figure is a sectional view partially showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Filter, 5... Partition wall, 7... Filter downstream end area, 8... Catalyst layer.

Claims (1)

【特許請求の範囲】 １ 内燃機関の排気ガスの流動方向に延び反対側
の端部がストツパによつて閉塞され多孔性の隔壁
によつて互いに分離された多数の通路を有する多
孔性磁器の一体的なフイルタブロツクからなり、
隔壁が、触媒層を備えフイルタの下流側端部の領
域において大きくされた流動抵抗を有する煤焼却
フイルタにおいて、 隔壁５が、フイルタ１の下流側端部の領域７に
おいて気密に形成され、隔壁５の触媒層８が、隔
壁５の気密な領域７の上流の領域で終結すること
を特徴とする煤焼却フイルタ。 ２ 隔壁５内に、セラミツク材料からなる縦方向
に延びるフアイバ材が埋め込まれることを特徴と
する、請求項１記載の煤焼却フイルタ。 ３ 気密な隔壁５が、フイルタ材料の細孔を閉塞
する材料による隔壁の含浸によつて製造されるこ
とを特徴とする、請求項１または２記載の煤焼却
フイルタ。[Scope of Claims] 1. An integral piece of porous porcelain having a number of passages extending in the flow direction of exhaust gas of an internal combustion engine, opposite ends of which are closed by stoppers and separated from each other by porous partition walls. It consists of a filter block,
In a soot incineration filter in which the partition wall is provided with a catalyst layer and has an increased flow resistance in the region of the downstream end of the filter, the partition wall 5 is formed in a gas-tight manner in the region 7 of the downstream end of the filter 1 and the partition wall 5 The soot incineration filter is characterized in that the catalyst layer 8 terminates in an area upstream of the gas-tight area 7 of the partition wall 5. 2. Soot incineration filter according to claim 1, characterized in that a longitudinally extending fiber material made of ceramic material is embedded in the partition wall (5). 3. Soot-burning filter according to claim 1 or 2, characterized in that the gas-tight partition 5 is produced by impregnation of the partition with a material that closes the pores of the filter material.
JP2184391A 1989-07-20 1990-07-13 Soot burning filter Granted JPH0357810A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3923985.3 1989-07-20
DE3923985A DE3923985C1 (en) 1989-07-20 1989-07-20

Publications (2)

Publication Number Publication Date
JPH0357810A JPH0357810A (en) 1991-03-13
JPH0581727B2 true JPH0581727B2 (en) 1993-11-16

Family

ID=6385438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2184391A Granted JPH0357810A (en) 1989-07-20 1990-07-13 Soot burning filter

Country Status (5)

Country Link
US (1) US5089237A (en)
JP (1) JPH0357810A (en)
DE (1) DE3923985C1 (en)
FR (1) FR2650029B1 (en)
GB (1) GB2233916B (en)

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Also Published As

Publication number Publication date
JPH0357810A (en) 1991-03-13
FR2650029B1 (en) 1993-08-13
FR2650029A1 (en) 1991-01-25
DE3923985C1 (en) 1990-06-28
GB2233916A (en) 1991-01-23
GB9015641D0 (en) 1990-09-05
GB2233916B (en) 1993-05-26
US5089237A (en) 1992-02-18

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